President Obama has reportedly said in private that he would speak up to stop Sen. Bernie Sanders from becoming the Democratic presidential nominee.

According to a report from Politico, an adviser told them:

"He hasn't said that directly to me," the adviser said. "The only reason I'm hesitating at all is because, yeah, if Bernie were running away with it, I think maybe we would all have to say something. But I don't think that's likely. It's not happening." 

But an Obama spokesperson is not confirming or denying whether or not Obama is against Sanders becoming the nominee.

"Look, we have a field of very accomplished, very serious and passionate and smart people who have a history of public service, and whoever emerges from the primary process I will work my tail off to make sure that they are the next president," Obama said per his spokesperson.

Obama has stayed quiet throughout the campaign about which

A close adviser told Politico that "I can't even imagine with this field how bad it would have to be for him to say something," the rumors that Obama would veto the Vermont senator.

Many were surprised when Obama did not publicly endorse former Vice President Joe Biden when he first announced that he would be running. Reports are floating around that Obama said privately that Biden "didn't have it," when it comes to becoming president.

One must now wonder, who Obama believes is equipped enough to fly the presidential flag for the Democrats?